Joseph j



(No Model.)

J. J. KIEPERLE. MECHANISM FOR CONVERTING ROTARY INTO REGIPROGATING MOTION.

No. 267,793. Patented N0v.Z1 18 8Z.

MM lummu Witnesses NITED STATES PATENT OFFICE. l

JOSEPH J.

KIEFERLE,

OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 267,793, dated November 21, 1882.

I Application filed October 5, 1882. (No model.)

To all whom itlnay concern:

Be it'known that I, JOSEPH J. KIEFERLE, of New York, in the county and State of New York, have invented a certain new and useful Improvement in Mechanism for Converting Rotary into Reciprocating Motion, of which which the following is a specification.

A screw having duplex reverse and intersecting threads has been used in conjunction with a fork for impartingareciprocatingmovement to various devices-among other things, to a carriage whereby the work is supported in a quilting-machine. The segmen t-pieces forming the screw-threads of such screws have always been an intregal part of the cylinders on which the screw-threads have been formed. Hence, if reciprocating movements of different lengths have been desired for adevice in a machine, different screws have had to be fitted into the machine. Great expense has been entailed in this way, and it-is the object of my invention to obviate it.

To this end my invention is a screw having duplex reversed and intersecting threads, and comprising segmentpieces which may be detached to vary the traverse produced by the screw.

The invention also'consists in the combination, with a screw having duplex reverse intersecting threads, of a fork engaging therewith, and having a swiveling connection with a carriage or other device to which reciprocating motion is to be imparted, and spring-stops for effecting the swiveling of the fork.

The invention also consists in the combination, with a screw having duplex reverse intersecting threads and comprising detachable segment-pieces, of a fork engaging with said screw and having a swiveling connection with the device to which reciprocating motion is to be imparted, so that it may be disengaged from one of the screw-threads and engaged with the other, and an adjustable spring-stop.

In the accompanying drawings, Figure l is a side view of a screw and appurtenances em bodying my invention. Fig. 2 is a plan or top view of the same. Fig. 3 is a transverse section thereof, and Figs. 4. and 5 are perspective views of detachable segment-pieces of different forms belonging to the screw. 7

Similar letters ot reference designate correspondin g parts in all the'figures.

.in engagement with the thread a.

A designates the screw. It has two threads, at and b, which extend around the screw in rereverse directions, and consequently intersect each other. Between these threads are a number of sharp-pointed segment-pieces, c, generally made in the form of a double V extending around the cylindric body of the screw. .The point-sections of these segment-pieces or the whole segment-pieces may be detachable. As here shown,the point-sections only are detachable and are secured in place by screws 01. The point-sections of themselves may be regarded as segment-pieces.

B designates a fork having a swiveling connection with a carriage or device. 0, to which a reciprocating motion is to be imparted by the screw A. This fork engages with but one thread of the screw aha time. It is shown as The screw is rotated constantly in one direction. Its thread a moves the carriage'ordevice in one direction, and its thread I) returns the said carriage or device. Before the return motion can take place the fork b has to arrive at a place where it can be swung or tilted at a reverse angle. There must be provided for this purpose interruptions in the screw-threads, and in order to vary the traverse of the carriage or other device these interruptions must occur at different points in the length of the screw.

I provide for making such interruptions by,

making the point-sections detachable, for then I can substitute short point-sections in place of long point-sections wherever I desire, and thus make an interruption in which the fork may be adjusted.

The fork is tilted by coming in contact with a stop, I). This stop is made adjustable, so that it may be arranged opposite any point in the length of the screw where an interruption of its threads is-made. It consists, as here shown, of a collar fitted to a rod, E, extending parallel with the screw,andit may be secured in position on the rod by a set-screw. A spring, S, attached to the front of'the collar renders the stop resilient. An arm,g, extending from the fork slides along the rod When it reaches the spring 6 it compresses the latter until it arrivesatthe interruption in the screwthreads, whereupon the spring tilts it so as to cause it to engage with a difl'erent screwthread, and holds it tilted until it has properly entered the different screw-thread.

At the opposite end of the rod E there is a stop, Gr, consisting of a spring attached to a bracket in. which the said rod is supported. There is at the adjacent end of the screw a space, h, in which the fork maybe tilted to engage with a difl'erent thread. There is a similar space, i, at the other end of the screw to provide for the tilting of the fork when it is allowed to traverse the whole length of the screw. In this case the stop D is shifted near to this end of the screw.

It will be seen that by my invention I provide for quickly, easily, and cheaply varying the traverse of the fork and without removing the screw from the machine of which it forms part. machines, notably in quilting-machines, where the traverse of the work-supporting carriage has to be frequently changed to vary the pattern of the quilting.

-What I claim as myinvention, and desire to secure by Letters Patent, is

1. A screw having duplex reversed and inlhis will be of vast advantage in many tersecting threads, and comprising segmentpieces which may be detached to vary the traverse produced by the screw, substantially as specified.

2. lhe combination, with a screw having duplex reverse intersecting threads, of a fork engaging therewith, and having a swiveling connection with a carriageor other device to which reciprocating motion is to be imparted, and spring-stops for effecting the swiveling of the fork, substantially as specified.

3. The combination, with a screw having duplex reverse intersecting threads and comprising detachable segment-pieces, of a fork engaging with said screw, and having a swivcling connection with the device to which reciprocating motion is to be imparted, so that it may be disengaged from one of the screwthreads and engaged with the other and an adjustable spring-stop. substantially as specified.

JOSEPH J. KIEFERLE.

Witnesses FREDK. HAYNEs, JAMES B. BOWEN. 

